What's the Name of That Book??? discussion

It's a series of six books, I think, but am only 90% sure. There could be more. The main character is a girl called Jill and I think she's about 12 years old, but I'm not sure, it's just what I'm thinking.
I read them when I was about 8-10 years old, so that would've been in 1998-2000. I don't think the books where new by then, but my mom didn't read them as a kid, they were too new for that.

My books had a light blue color, but they were Danish, so that might not be helpful to you.

In Danish, they all had titles with the name Jill in them, which I think is true for the English ones as well.

Does anyone know what I'm talking about?

Do you remember anything about the plot?
What time period/location does the story take place?

Were there any mystery, sci-fi, fantasy elements in the book?

No, it was just about this girl and her friends and stuff like that, basically just about her everydaylife on the boarding school.
I think it took place in the 80's and I think that's when the book was from as well, but I don't know

The Jill series by Valerie Hastings is set in an English boarding school. https://www.goodreads.com/series/5555...
But Goodreads shows only two books in this series;the first is Jill at Hazelmere?

I found the series I was looking for. It was the Jill Robinson series by Anne Digby
https://www.goodreads.com/series/9763...

Great! Thanks for letting us know. :) I find it can be tricky sometimes tracking down British and European books.

Me, Jill Robinson and the Television Quiz for the link.